Outa all the moves that I do with OS, I CH the most off of 5S and 2S. 2S jackes up people lie Jam and Mila all the time when they try to scoot in and 5S checks slayer and potemkins chin lie WOAH. But I rarely remember to Fafnir after 6HS in teh heat of a fight.. Need moar tranin..
Anyway,
If a character is rushin in and you 2S them ankles, then I bet its more and more possible but - meh lol.
One thing that I have found out that is MASSIVE tho:
If a A.B.A. Danzies in your face, you can 6HS after the first hit and you won't get hit which pretty much ends lie: Danzie_in_tha_face->Block first hit->6HS before 2nd hit->6HS->Fafnir->6HS. Massive 4 hit combo. Prolly better things to do - but we arer talkin about 6HS into Fafnir here..